264222691 has 2 divisors, whose sum is σ = 264222692. Its totient is φ = 264222690.

The previous prime is 264222617. The next prime is 264222701. The reversal of 264222691 is 196222462.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-264222691 is a prime.

It is not a weakly prime, because it can be changed into another prime (264222601) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 132111345 + 132111346.

It is an arithmetic number, because the mean of its divisors is an integer number (132111346).

Almost surely, 2^264222691 is an apocalyptic number.

264222691 is a deficient number, since it is larger than the sum of its proper divisors (1).

264222691 is an equidigital number, since it uses as much as digits as its factorization.

264222691 is an evil number, because the sum of its binary digits is even.

The product of its digits is 20736, while the sum is 34.

The square root of 264222691 is about 16254.9282065471. The cubic root of 264222691 is about 641.6871913226.

The spelling of 264222691 in words is "two hundred sixty-four million, two hundred twenty-two thousand, six hundred ninety-one".